I have a multi-column searchable html table. The search works fine when entering a search term in firefox (both Linux and Win10) but freezes completely in other browsers (tried Avast, Brave, Chrome (both Linux and Win10), Chromium, Edge, Opera).

The code (modified to show only one of 15 columns) permits to search an HTML table for a given term in the textbox, and hides table rows not matching this query. What is the difference between firefox and the other browsers?